High-temperature protective coating for steel billets and applications thereof

A technology of protective coatings and steel billets, applied in coatings and other directions, can solve problems such as not easy to peel off, and achieve the effect of maintaining compactness, bonding tightly, and ensuring compactness and integrity

Active Publication Date: 2015-09-02
SHIJIAZHUANG BINGXIN METALLURGICAL CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a steel billet high temperature protective coating for solving the technical problems of surface decarburization in the heating process o

Method used

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  • High-temperature protective coating for steel billets and applications thereof
  • High-temperature protective coating for steel billets and applications thereof
  • High-temperature protective coating for steel billets and applications thereof

Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] The application of the steel billet high-temperature protective coating of this embodiment includes the following steps: combining 45g SiC, 13g SiO 2 , 7g Al 2 O 3 , 3g Cr 2 O 3 , 8g blast furnace slag, 0.2g sodium hexametaphosphate and 0.2g cellulose are mixed uniformly, add water (76.4g) according to the mass ratio of 1:1, and manually brush on the surface of 60Si2Mn steel billet after mixing, the coating thickness is 0.6 mm. Heat to 1250°C and keep it for 2 hours. After the end, the thickness of the decarburized layer is determined to be 0.4mm.

Example Embodiment

[0025] Example 2

[0026] The application of the steel billet high-temperature protective coating of this embodiment includes the following steps: 40g SiC, 10g SiO 2 , 13g Al 2 O 3 , 8g Cr 2 O 3 , 9g blast furnace water slag, 0.2g sodium hexametaphosphate and 0.2g cellulose are mixed uniformly, add water (96.48g) according to the mass ratio of 1:1.2, and spray on the surface of 60Si2CrA steel billet after mixing uniformly, the coating thickness is 0.4mm . Heat to 1250°C and keep it for 2 hours. After the end, the thickness of the decarburized layer is determined to be 0.4mm.

Example Embodiment

[0027] Example 3

[0028] The application of the steel billet high-temperature protective coating of this embodiment includes the following steps: combining 35g SiC, 25g SiO 2 , 16g Al 2 O 3 , 6g Cr 2 O 3 , 5g blast furnace slag, 0.2g sodium hexametaphosphate and 0.2g cellulose are mixed uniformly, add water (61.18g) according to the mass ratio of 1:0.7, and manually brush on the surface of 60Si2MnA steel billet after mixing. The coating thickness is 0.6 mm. Heat to 1250°C and keep it for 2 hours. After the end, the thickness of the decarburized layer is determined to be 0.4mm.

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Abstract

The invention discloses a high-temperature protective coating for steel billets and applications thereof, relates to a coating or cladding material temporarily applied before the heat treatment of alloys, and particularly relates to a coating or cladding material which is temporarily applied before the heat treatment of alloys and used for preventing the high-temperature decarburization of steel billets and reducing the difficulty of dephosphorization. The invention is designed for providing a high-temperature protective coating for steel billets, which can effectively reduce the surface decarburization layers of special steel billets. The high-temperature protective coating for steel billets disclosed by the invention comprises the following components in parts by mass: 15-50 parts of SiC, 10-25 parts of SiO2, 5-20 parts of Al2O3, 3-10 parts of Cr2O3, 5-15 parts of granulated blast furnace slags, 0.2 part of sodium hexametaphosphate and 0.2 part of celluloses. The coating of the invention can reduce the high-temperature oxidation burning loss of steel billets in a furnace, and meanwhile, alleviate the high-temperature dilution and decarburization of alloying elements on the surfaces of steel billets, and solve the problem that the difficulty of surface descaling of special steel is large; and an iron scale generating structure is modified by the coating, so that the high-pressure water descaling effect after steel billets are discharged out of a furnace is greatly increased. The coating disclosed by the invention is applied to the field of steel rolling.

Description

technical field [0001] The invention relates to a coating or cladding material temporarily applied before heat treatment of an alloy, in particular to a coating or cladding material temporarily applied before heat treatment for preventing high-temperature decarburization of a billet and reducing the difficulty of dephosphorization. Background technique [0002] In foreign countries, the research on high-temperature anti-oxidation coatings for steel has already attracted people's attention. At present, countries and regions such as the United States, Japan, and Western Europe mostly use heat-resistant coatings based on metal oxides, glass-ceramics, and complex mixtures to prevent various carbon steels, alloy steels, etc. from rolling, forging, and heat treatment. high temperature oxidation occurs. For example, the ATP Metallurgical Coatings series of high-temperature anti-oxidation and decarburization coatings of Advanced Technical Products in the United States, the condursa...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12
Inventor 常瑞欣吴逸群窦光涛
Owner SHIJIAZHUANG BINGXIN METALLURGICAL CHARGE
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